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| Smethurst,Philip James; Gonçalves,José Leonardo de Moraes; Pulito,Ana Paula; Gomes,Simone; Paul,Keryn; Alvares,Clayton Alcarde; Arthur Júnior,José Carlos. |
| The Soil Nitrogen Availability Predictor (SNAP) model predicts daily and annual rates of net N mineralization (NNM) based on daily weather measurements, daily predictions of soil water and soil temperature, and on temperature and moisture modifiers obtained during aerobic incubation (basal rate). The model was based on in situ measurements of NNM in Australian soils under temperate climate. The purpose of this study was to assess this model for use in tropical soils under eucalyptus plantations in São Paulo State, Brazil. Based on field incubations for one month in three, NNM rates were measured at 11 sites (0-20 cm layer) for 21 months. The basal rate was determined in in situ incubations during moist and warm periods (January to March). Annual rates of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Forest soil; Soil temperature; Process-based model. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000200523 |
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| Horst,Taciara Zborowski; Dalmolin,Ricardo Simão Diniz; Caten,Alexandre ten; Moura-Bueno,Jean Michel; Cancian,Luciano Campos; Pedron,Fabrício de Araújo; Schenato,Ricardo Bergamo. |
| ABSTRACT The study of the relationships between the yield potential of forest stands and the conditions offered for plant development is fundamental for the adequate management of the forest when aiming at sustainable high yields. However, these relations are not clear, especially in commercial forests, on rugged terrain where relationships between the landscape, soil, and plants are more complex. Considering this, we tested the hypothesis that the morphological aspects of the soil conditioned by topography are the main limiting factors for tree development. Our objective was to evaluate the edaphic and topographic influence on the dendrometric variation of Pinus taeda L. of a forest stand in a subtropical climate at high altitude. For that, Spearman’s... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Forest soil; Soil-landscape relationship; Forest site; Soil use; Forest zoning. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100318 |
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| SOUSA, G. F. de. |
| An experiment was designed to determine the effect of 5 forest soil horizons on the growth of Picea glauca (Moench) Voss and to evaluate the contribution of each horizon and two levels of lime in the rate of organic matter decomposition and availability of nutrients. The growth of spruce measured by the fresh and dry weight was affected considerably by the percent organic matter in the soil. The concentration of nutrients in tops and roots was closely related to the concentration of nutrients in the soil with the exception of Ca and Mg concentration. These two elements showed concentration that were higher in tops and roots of white spruce grown in low horizons. This, however, was associated with a decrease in growth. The organic matter was probably the... |
| Tipo: Teses |
Palavras-chave: Forest soil; Fertility.; Fertilidade; Solo Florestal.. |
| Ano: 1974 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/401561 |
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| MAIA, C. M. B. de F.; FUKAMACHI, C. R. B.; CAMBRONERO, Y. C.; DEDECEK, R. A.; MANGRICH, A. S.; NARIMOTO, K. M.; MILORI, D. M. B. P.; SIMOES, M. L.. |
| Compreender os processos de estabilização do carbono no solo pode ser muito útil no desenvolvimento de técnicas de mitigação das emissões de CO2 e do aquecimento global. Quanto maior a hidrofobicidade da matéria orgânica do solo, mais estabilizado é o carbono do solo. Portanto, a hidrofobicidade pode ser usada como indicador para caracterizar a qualidade da matéria orgânica do solo. O presente trabalho caracterizou as estruturas químicas de ácidos húmicos extraídos de solos coletados a três profundidades de um Neossolo sob plantação de Pinus taeda. Os resultados das análises espectroscópicas e químicas (ultra-violeta, fluorescência, ressonância paramagnética eletrônica e difração de raio-X) indicaram que a ocorrência de estruturas conjugadas, grupos... |
| Tipo: Artigo de periódico |
Palavras-chave: Humic acid; Water repellency; Forest soil; EPR; X-ray.; Fluorescence.. |
| Ano: 2010 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/872636 |
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| Maia, Claudia Maria Branco de Freitas; Fukamachi, Cristiane Regina Budziak; Cambronero, Yorleni Chang; Dedecek, Renato Antônio; Mangrich, Antônio Sálvio; Narimoto, Kelly Mayumi; Milori, Débora M.B.P.; Simões, Marcelo Luiz. |
| The understanding of soil carbon stabilization processes can be very useful in the development of mitigation techniques for CO2 emissions and global warming. The greater the hydrophobicity of soil organic matter the more stabilized soil organic carbon. Therefore, hydrophobicity can be a sensitive index to characterizethe ‘quality’ of soil organic matter. In this context, the present work aimed to characterize the chemical structures of humic acids collected at three different depths in a hydrophobic Entisol (Neossolo) under loblolly plantation. The results of spectroscopic and chemical analyses (UV-Vis, fluorescence, EPR and X-ray diffractometry) indicated that, as soil depth increased, so did the content of conjugated organic structures, aromatic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Humic acids; Water repellency; Forest soil; Fluorescence; EPR; X-ray. Solos florestais; Repelência à água; RPE; Fluorescência; Raio-X.. |
| Ano: 2010 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/86 |
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| Boeckx,Pascal; Vervaet,Hilde; Cleemput,Oswald van. |
| Nitrous oxide (N2O) and nitric oxide (NO) are important atmospheric trace gases, and soils (including forest soils) are a substantial source of both gases. In forests subjected to elevated N deposition these emissions are considered as indirect emissions from agricultural N sources (mainly NH3) or combustion (e.g. NOx from traffic). However, knowledge about N2O and NO exchange between forests and the atmosphere is scarce. The aim of this study was to determine N2O and NO emission rates from a deciduous forest in Belgium, receiving a high N-deposition (ca. 40 kg N ha-1 yr-1). In April 2000, the NO emission from the forested location was 17.3 (± 1.2) and 17.05 (± 0.7) ng NO-N m-2 s-1, respectively, for the soil including the organic layer and the mineral... |
| Tipo: Journal article |
Palavras-chave: Emission; Forest soil; Nitrogen; Cycling; Nitric oxide; Nitrous oxide. |
| Ano: 2005 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-66432005000200003 |
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